Question

Nuisance growth of aquatic plants and bloom-forming algae in natural
waters is generally due to high concentrations of:
a. carbon
b. sulphur
c. calcium
d. phosphorus


NCERT Class XII
Biology - Main Course Book

Chapter 16. Environmental Issues

Answer 1

The answer is: (d) Phosphorous.

Answer 2

Answer:

Nuisance growth of aquatic plants and bloom-forming algae in natural

waters is a concentration of Phosphorous.

Option D

Explanation:

• The phenomenon of the uncontrolled growth of aquatic weed on the surface of a water body is called Eutrophication.    
• This eutrophication occurs due to the high fertilizer or growth promoting chemical content of the water.
• This leads to high growth of weed which in turn have negative effects on the water ecosystem.
• The fertilizers mainly contains phosphates i.e. Compounds of phosphorous.